{"id": "CVE-2026-17042", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-17042", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-19T19:24:22.753664Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "psirt@us.ibm.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 4.7, "exploitabilityScore": 2.0}]}, "affected": [{"source": "psirt@us.ibm.com", "affectedData": [{"cpes": ["cpe:2.3:o:ibm:power_systems_firmware:fw950.00:*:*:*:*:*:*:*", "cpe:2.3:o:ibm:power_systems_firmware:fw950.h2:*:*:*:*:*:*:*", "cpe:2.3:o:ibm:power_systems_firmware:op940.00:*:*:*:*:*:*:*", "cpe:2.3:o:ibm:power_systems_firmware:op940.a1:*:*:*:*:*:*:*"], "vendor": "IBM", "product": "Power Systems Firmware", "versions": [{"status": "affected", "version": "FW950.00", "versionType": "semver", "lessThanOrEqual": "FW950.H2"}, {"status": "affected", "version": "OP940.00", "versionType": "semver", "lessThanOrEqual": "OP940.a1"}, {"status": "affected", "version": "OP940.00", "versionType": "semver", "lessThanOrEqual": "OP940.81"}]}]}], "published": "2026-08-19T20:17:12.127", "references": [{"url": "https://www.ibm.com/support/pages/node/7283240", "tags": ["Vendor Advisory"], "source": "psirt@us.ibm.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "psirt@us.ibm.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "IBM Power Systems Firmware FW950.00 through FW950.H2, OP940.00 through OP940.a1 (Power9), and OP940.00 - OP940.81 (Power HMC) is affected by a vulnerability in host firmware NVRAM parsing. An attacker with root access to a guest partition on an OpenPOWER system can write a specially crafted NVRAM image, causing the host firmware boot stage to crash with possible memory corruption. This condition persists until operator intervention \u2014 clearing NVRAM via the service processor \u2014 to restore normal operation. This vulnerability only affects OpenPOWER systems; systems running PowerVM are not affected. 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